Hemstitch sewing and embroidering machine.



R. CORNELY.

HEMSTITGH SEWING AND EMBROIDERING MACHINE;

APPLICATION FILED APR. 15, 1913. 1,()9Q,] 36, Patented Mar. 17, 1914 4SHEETS-SHEBT .1.

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R. CORNBLY.

HEMSTITCH SEWING AND EMBROIDERING MACHINE.

APPLICATION FILED APR.15, 191a.

1,090,1 36. Patented Mar. 17, 1914.

4 SHEETS-SHEET 2.

COLUMBIA PLANOGRAFH can wasmmn'oN, D. c,

H.00RNELY. HEMSTITGH SEWING AND EMBROIDERING MACHINE.

APPLICATION TILED APR.15, 1013 1,090, 1 36, Patented Mar. 17, 1914.

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R. GORNELY.

nnms'mca SEWING AND BMBROIDERING MACHINE.

APPLICATION IILED APR. 15, 1913. 1,()9(),1 36, Patented Mar. 17,1914.

4 SHEETS-SHEET 4.

wi bmoeo (P0 4 95 UNITED STAEES EATENT UFIFIQE,

ROBERT CORNELY, OF PARIS, FRANCE.

HEMSTITGH SEWING AND EMBROIIDELRING MACHINE.

To all whom it may concern Be it known that I, Ronnn'r Connolly, acitizen of the United States, resident of Paris, France, have invented anew and useful Improvement in Ilemstitch Sewing and EmbroideringMachines, which is fully set forth in the following specification.

The present invention relates to improvements in hemstitch sewing andembroideriug machines in which the formation of the seam is obtained bythe cooperation of two needles having a combined vertical and lateraldisplacement, working in conjunctioi'i with a piercer which pierces thematerial. But ince in these machines the effect of the seams depends notonly on the amplitude of the stroke of the lateral or spreading movementof the needles, but also on the distance at which the needles performtheir lateral or spreading movement from each other, (which lateraldistance determines the width between the two inner rows of seams of thehemstitch), these machines must be provided with means not only forregulating the stroke of the spreading movement of the needles, but alsofor controlling the distance at which the needles perform theiroscillating or spreading motion from each other, by means of regulatingdevices which permit an exact adjustment and which will not get out ofadjustment at high speeds of the machine, which result has been obtainedheretofore only by delicate and unreliable do vices. Further it isnecessary in hemstitch eu'ibroidering machines with universal feed thatthe operator shall be able to interrupt at will the feed of the materialwhile the machine continues working, in order to pro duce angular seamsor small curves or circles.

Finally, an objection heretofore existing in machines working withpivoted needlebars, resided in the fact that the transmission of theturning movement of the crank handle which governs the direction of thefeed upon the needle-bars was obtained by means of different gears ortransmissions upon the upper and lower parts of these needle-bars, sothat as soon as a certain wear or play took place between these gears ortransmissions, the upper and under parts of these needle-bars no longerturned strictly together, thus oceasioning strain and bend ing of theneedle-bars and of their joints and undue wear of the machine.

The object of the present invention is to Specification of LettersPatent.

Application filed April 15, 1913.

Patented Mar. 17, 1914.

Serial No. 761,281.

obviate these inconveniences. liy way of example, one expression of theinventive idea as applied to a universal feed embroidering mach ne isillusl rated in the accompanying drawings.

l igure ll a side view partly in section; 1* 1g. is a front v ew; Figs.3, 41, 5, 6, 7, 10, 11 and are details hereafter to be referred to, andFigs. 8 and 9 show the transmission of the turning movement of the crankhandle which governs the direction of the feed, upon the central tube ofthe needlobars, as well as the provisions for interrupting at will thefeed of the material, while the stitch forming elements of the machinecontinue working.

in the present cxan'lple the lateral displacement or spreading of theneedle-bars is obtained by the up and down motion of a wedge-sluipedpart, the inclined surfaces of which act against corresponding inclinedsurfaces of slides counterpressed by springs, said slides being providedwith pivoted guides through which pass the needle-bars. In order topermit the adjustment of the distance between the two inner rows of thehem-seam, this wedge-shaped part has, in the present invention, beensecured adjustably in its height upon a vertically moving sleeve orslide and according to the height at which it is adjusted, the constantdistance between the two inner rows for each seam to be produced, willbe increased or decreased. Because it is very important to adjust theposition of the needle spreading device with great precision and alsovery important that after its a(iljustment it will not become out ofadjustment during the work, this wedge-shaped part has in the presentinvention been provided in such manner upon the up and down moving slideor sleeve, that its position is adjusted by a reg ulating deviceprovided with an incline which acts against a corresponding incline ofthe wedge-shaped part and since during the work of the machine theresistance acting upon this wedge shaped part is transmitted upon theincline of the regulating device, the angle of which latter incline isvery small only, it will be clear that after having been screwed inposition, a loss of adjustment need not be feared.

Main shaft 1 of the machine (Fig. 1) is provided with a gear wheel 2which drives a gear wheel 3 three times larger mounted on a shaft 4provided with a earn 5 which oscillates a bell crank lever 7 pivoted at6. The under arm of this bell crank lever 7 is provided with a slot 8 inwhich engages a bolt 9 which at the same time engages in a correspondingslot of lever 11 pivoted at 10; as shown and described in United StatesLetters Patent No. 944,599 of December 28, 1909, according to theposition of bolt 9 in slot 8, the oscillation of lever 11 can beregulated from zero to a maximum. The other end of lever 11 transmits anoscillating motion to slide 12 which is provided with a fork 13 whichengages in a slot of sleeve 14 which thus receives an up and down motionupon the central tube 29. A wedge-shaped part 15 (Fig. 1) is providedadjustably upon this sleeve 1.1 and secured in position by a screw 16which passes through a slot of said wedge-shaped part 15. Upon sleeve14': is mounted a movable adjustment device 18 provided with an incline17 which bears against the upper part of the wedge-shaped part 15provided with a corresponding incline. It is clear that according to theposition of this regulating device 17-18, which maybe provided withdivisions a, b, 0, allowing a very exact adjustment, the position ofsaid wedge-shaped part 15 can be regulated with the greatest precisionand maintained in place by screw 19.

In the downward motion of the wedgeshap'ed part 15, its two inclinedfaces (see 4: and 6, the latter being a horizontal section on line ABFig. 1,) act against corresponding inclines 20 and 21 of slides 22 and23 which are counterpressed by springs 61 and 62; with said slides 22and 23 there are connected in a pivotal manner two giiides 25 and 26through which pass the lower ends of the needle-bars 27 and 28. As shownin Fig. 7 these guides 25 and 26 are provided with spindles which arerevo-luble within sockets in the slides 22 and in order'to follow allangular displacements of the needle-bars 27 and 28 in their oscillation.It will be seen from Fig. 1O that this adjus ment device 1718 canequally well be used in combination with machines in which the spreadingof the needles is obtained by means of pins 67 and 68 upon the sleeve 14engaging in inclined slots 69 and upon slides 71 and 72. For thispurpose it is merely necessary to arrange the arms 73 and 74 carryingsaid pins 67 and 68 upon a slide which is adjustable by the regulatingdevice 1718 in the manner above described.

In universal feed embroidering machines it is necessary that theneedle-bars as well as the parts depending from the central tube 29 ofthe machine shall turn exactly together with said central tube inconformity with the crank handle 30 (Fig. 8) which governs the directionof the feed of the material. "VVhenthese' machines were provided withpivoted needle-bars there was heretofore the inconvenience that theupper ends of the needle-bars were pivoted to an upwardly and downwardlymoving sleeve 31 (Figs. 1 and 9) which received its turning motionindirectly from the central tube 29 by means of a certain number ofgears 63, 64, 65, 66 and intermediate transmissions, while the lowerends of these needle-bars were guided in parts depending directly ofsaid central tube 29, the consequence of this was that as soon as acertain wear or play had taken place in said gears or said transmissions, the upper and lower ends of the needle-bars no longer turnedstrictly together, thus occasioning strains and deformations of theneedle-bars and of their pivots and wear upon the machine. In order toobviate these inconveniences, in the present improvement the needlebars27 and 28 are not pivoted to sleeve 31 (Figs. 1 and 9) but on thecontrary, they are fixed rigidly on said sleeve 31 and at the same timea sleeve 32 is secured within central tube 29 and is provided withpassages Within which the upper parts of the needle-bars 27 and 28 areguided, while the hinges 33 and 34 of the needle-bars 27 and 28 areprovided underneath said sleeve 32, and since the lower ends of theseneedlebars are guided at 25 and 26 in slides 22 and 23 (Figs. 4, 5 and6) pro vided directly on this one and same central tube 29, it is clearthat the upper and lower ends of these needle-bars 27 and 28 will turnfor their full. length directly together with the central tube 29 sothat deformation of the needle-bars or of their pivots will be obviated.In these machines it is also necessary for the production of angularseams or small turnings or circles, that the operator may at willinterrupt the feed of the inaterial while the stitch forming mechanismsof the machine continue to perform their work. In the present inventionthis is obtained in the following manner: The above described shaft 1(Figs. 1 and 2) is provided with a cam 35 which engages one arm of alever 36 connected to slide 38, thus vertically moving the latteragainst the tension of a spring 37. This slide 38 operates the feed ofthe material in the manner well known in universal feed embroideringmachines. In order to interrupt the action of this lever 36 at the willof the operator and of course at the same time to interrupt the feed ofthe material, an arm 39 is pivoted at 10 and according to the positionof this arm 39, the lever, 36 is either free to swing (Figs. 1 and 2) orblocked against movement (Fig. 3). The arm 39 may be controlled forexample from the crank handle 30 (Fig. 8) which for this purpose isprovided with a leverdl upon which the operator acts at the requiredmoment; its displacement is transmitted to the arm '39'by means oflever-42,

rod 43, lever 44, rod 45, bell c -ank lever 16 and rod 47 under thecounterpressure of a suitably arranged spring. The arm 39 may also becontrolled by a lever 48 (Figs. 1 and 8) having an operating cord andring 49 which can be operated by the hand of the operator which guidesthe material upon the table. Again, the arm 39 may be operated by thefoot or knee of the op erator by means of a prolongation 50 Fig. 8) ofrod 45, this being suitably connected to a treadle or a knee lever. Theup and down motion of the piercer 53 (Figs. 1 and 2) which is providedbetween the needles 51 and 52 is obtained from the main shaft 1 of themachine by means of a cam 54L, bell crank lever 55, rod 56 and slide 57,from which a fork 58 transmits an up and down motion to the sleeve 59which carries the rod 60 of the piercer 53.

Figs. 11 and 12 show the manner in which a thin and fiat ribbon 76 maybe sewn to the material by the spreading needles 51 and 3'2 and piercedby the piercer. This obtained by providing guide 77 within the presserfoot 78, said guide 77 being provided with a slot 79 corresponding inits dimensions to the width and thickness of the ribbon and a verticalpassage for the needles and the piercer. By means of this arrangement aribbon or the like may be secured to the material, said ribbon being atthe same time embroidered with a hem stitch.

WVhile for the purpose of illustration there has herein been shown anddescribed in con siderable detail one expression of the inventive idea,it is to be understood that the invention is not limited to theconstruction shown, but that the inventive idea is susceptible ofvarious mechanical embodiments conforming to the definition of theinvention set forth in the appended claims.

Claims.

1. In a device of the character described, the combination of aplurality of needle bars, means for reciprocating the same, avertically-moving member, means for operating the same, means forspreading sald needle bars mounted upon said member, and

means carried by said member for adjusting the position of saidspreading means on said member.

2. In a device of the character described, the combination of aplurality of needle bars, means for reciprocating the same, avertically-moving member, means for operating the same, means forspreading said needle bars mounted upon said member, and an adjustableregulating device carried by said member and engaging said spreadmgmeans.

3. In a device of the character described, the combination of aplurality of needles, means for reciprocating the same, avertically'moving member, means for operating the same, a device mountedupon said member for spreading said needles, said device being providedwith an incline or cam surt ace, and an adjustable regulating deviceacting on said spreading device and provided with a (ani'espondingincline or cam surface, said surfaces engaging one another.

-l. In a device of the character described, the combination of aplurality of needles, means for reciprocating the same, avertically-moving member, means for operating the same, a device mountedupon said member for s ta'eading said needles, said device beingprovided with an incline or cam surface, and an adjustable regulatingdevice carried by said member and provided with a corres nmding inclineor cam surface, said surfaces engaging one another.

In a device of the character described, the combination of a pluralityof reciprocating needle bars, slides through which said bars pass, and aneedle spreading device comprising a reciprocating support, awedgeshaped member mounted thereon, the inclined faces of which actagainst said slides to spread the needles, and means to adjust saidwedge member on its support to vary the spread of the needles.

(3. In a device of the character described, the combinatitm ofreciprocating needle bars, spring-pressed, slides through which saidbars pass, a vertically-moving member, a wedge-shaped needle-spreadingdevice carried by said member and having inclines bearing on saidslides, and means carried by said member for adjusting the position ofsaid device.

7. In a device at the character described, the combination of a centraltube, a plurality of needle bars arranged in said tube, means forreciprocating said bars, a sleeve secured in the upper end of said tubeand having passages through which the needle bars pass, joints beingprovided in said needle bars below said sleeve, and means for spreadingthe lower ends of said needle bars.

8. Tu a device of the diameter described, the combination of a pluralityof needle bars each in two sections pivoted together, means forreciprocating said bars, a central tube through which said bars pass,means carried by the upper end of said tube and engaging the upper partof each of said bars, movable elements mounted on said tube to which thelower ends of said bars are connected, means operating said elements tospread said bars, and means for rotating said central tube whereby theupper and lower sections of each bar receive their turning movementdirectly from said tube.

9. In a device of the character described, the combination of aplurality of needle bars each in two sections pivoted together,

means for reciprocating said bars, a central tube through which saidbars pass, a sleeve carried in the upper end of said tube, said sleevebeing provided with passages through which the upper sections of saidbars pro jOCt, slides mounted on the lower end of said tube, said slidesengaging the lower ends of said bars, means operating said slides tospread said bars, and means for r0- 10 tating' said central tube wherebythe upper ROBERT CORNELY.

itnesses GEORGE E. LIGHT, LUCIEN MEMMINGER.

cepiea of thin patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G."

